persistent_rope/
lines.rs

1use alloc::string::String;
2
3use super::{Chars, Rope};
4
5pub struct Lines<'a> {
6  chars: Chars<'a>,
7}
8
9unsafe impl<'a> Sync for Lines<'a> {}
10unsafe impl<'a> Send for Lines<'a> {}
11
12impl<'a> From<&'a Rope> for Lines<'a> {
13  #[inline]
14  fn from(rope: &'a Rope) -> Lines<'a> {
15    Lines {
16      chars: Chars::from(rope),
17    }
18  }
19}
20
21impl<'a> Iterator for Lines<'a> {
22  type Item = String;
23
24  #[inline]
25  fn next(&mut self) -> Option<Self::Item> {
26    let mut string = String::new();
27
28    while let Some(ch) = self.chars.next() {
29      if ch == '\r' {
30        if let Some(next_ch) = self.chars.next() {
31          if next_ch == '\n' {
32            continue;
33          } else {
34            string.push(ch);
35            string.push(next_ch);
36          }
37        } else {
38          string.push(ch);
39          break;
40        }
41      } else if ch != '\n' {
42        string.push(ch);
43      } else {
44        break;
45      }
46    }
47
48    if string.len() != 0 {
49      Some(string)
50    } else {
51      None
52    }
53  }
54}
persistent_rope/lines.rs

persistent_rope/
lines.rs
